You can clone with
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Mainly, cot_mail should automatically add linebreaks to the email body, so each line will be no longer than 78 characters. Of course this should be done in a way that supports multibyte characters (UTF-8).
Also, in order to support the full UTF-8 character set, the email body should be base64 encoded. Some solutions for UTF-8 support are offered here (in the comments): http://php.net/manual/en/function.mail.php